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GLOBAL_LOG_LEVEL defaults to INFO, so every log.debug(...) in the backend is discarded, but the message is built first: 187 call sites interpolate their payload into an f-string before the logging call runs, so the work happens on every request and the result is thrown away. The worst one sits in process_chat_payload and stringifies the whole request body, full conversation history included, once per chat completion.
That one line with DEBUG disabled, CPython 3.12:
| conversation | payload | before | after |
| ------------ | ------- | -------- | ------- |
| 4 messages | 1.2 kB | 3.4 us | 0.07 us |
| 20 messages | 17 kB | 24.8 us | 0.07 us |
| 60 messages | 123 kB | 216.6 us | 0.07 us |
The lazy form log.debug('form_data: %s', form_data) hands the payload to record.getMessage(), which the InterceptHandler only reaches once a record has passed the level check. With DEBUG enabled the emitted lines are byte-identical, f'{x=}' sites included: those map to %r. MistralLoader._debug_log callers get the same treatment, since that wrapper already forwards *args.
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| .. | ||
| access_control | ||
| images | ||
| mcp | ||
| telemetry | ||
| actions.py | ||
| anthropic.py | ||
| asgi_middleware.py | ||
| audit.py | ||
| auth.py | ||
| automations.py | ||
| calendar.py | ||
| channels.py | ||
| chat.py | ||
| chat_fork.py | ||
| chat_id.py | ||
| chat_variables.py | ||
| code_interpreter.py | ||
| context_compaction.py | ||
| embeddings.py | ||
| files.py | ||
| filter.py | ||
| groups.py | ||
| headers.py | ||
| json_codec.py | ||
| json_response.py | ||
| logger.py | ||
| memory.py | ||
| middleware.py | ||
| misc.py | ||
| model_ids.py | ||
| models.py | ||
| notifications.py | ||
| oauth.py | ||
| payload.py | ||
| pdf_generator.py | ||
| plugin.py | ||
| rate_limit.py | ||
| redis.py | ||
| response.py | ||
| sanitize.py | ||
| security_headers.py | ||
| session_pool.py | ||
| subagents.py | ||
| task.py | ||
| terminals.py | ||
| timers.py | ||
| tools.py | ||
| validate.py | ||
| valves.py | ||
| webhook.py | ||